The Beginning to the End of the Universe: The mystery of dark energy
Why is the universe dark by default? - Quora
Why is everywhere in space dark yet there are stars and sun that could have lighted it up? - Quora
Why There Is Light on Earth But Not in Space
Why is space so dark even though the universe is filled with stars?
Why Is Space Black? Olber's Paradox and the Cosmic Night Sky
Did 'dark stars' help form the Universe?
If the Sun lights up the Earth, why is space dark? - Quora
What Was It Like When Dark Energy First Took Over The Universe?
Neutron stars could be the ultimate dark matter detectors
Astronomy – News, Research and Analysis – The Conversation – page 2